Preparation method of high-temperature alloy plate for aeroplane engine

Abstract

The invention discloses a preparation method of a high-temperature alloy plate for an aeroplane engine. The preparation method comprises the following steps that (1), high-temperature alloy powder isprepared; (2), the prepared high-temperature alloy powder is subjected to electrostatic impurity removal; (3), the high-temperature alloy powder after electrostatic impurity removal is subjected to vacuum degassing and is deposited on a copper annular depositing device through an injector to obtain a plate blank; (4), the obtained plate blank is subjected to densification treatment by isothermal forging; and (5), the obtained plate blank is subjected to heat treatment. The high-temperature alloy plate meeting the requirements of a novel aerospace engine can be prepared by the preparation method of the high-temperature alloy plate for the aeroplane engine.

Description

technical field [0001] The invention belongs to the technical field of high-temperature alloy disc preparation, and in particular relates to a method for preparing a high-temperature alloy disc for an aero-engine. Background technique [0002] With the further improvement of the thrust-to-weight ratio requirements of aerospace engines, the gas temperature at the hot end of aero-engines continues to rise, and the requirements for the working temperature and performance of superalloys are getting higher and higher. Excellent performance, more and more widely used in the hot end of the engine. [0003] However, with the further increase of the service temperature, the traditional nickel-based superalloy parts cannot meet the requirements of the new engine for the disk parts due to factors such as alloy segregation and structural instability. The United States and Russia began to use powder metallurgy at the end of the last century. Methods Nickel-based high-temperature alloys ...

AI Technical Summary

Problems solved by technology

[0003] However, with the further increase of the service temperature, the traditional nickel-based superalloy parts cannot meet the requirements of the new engine for the disk parts due to factors such as alloy segregation and structural instability. The United States and Russia began to use powder metallurgy at the end of the last century. The method produces nickel-based high-temperature alloy, and the structure of powder metallurgy parts is uniform and the grains are fine, which significantly improves the mechanical properties of the alloy

[0004] However, the production process of powder metallurgy parts is complicated. The conventional process includes alloy smelting, powder preparation, powder screening, hot isostatic pressing of jacket, forging and heat treatment of parts. Based on the uniqueness of powder metallurgy parts, the formed disc parts will There are defects such as PPB, inclusions, and heat-induced holes that seriously affect the performance of powder metallurgy parts, resulting in reduced durability and fatigue performance, and even serious situations such as disc fracture and engine damage, causing major safety accidents

Images